Show:
multiplication
Find the Rule
100

13x10

130

100


7---13

12--18

19--25

38--44

add 6

200

37x45

1,665

200

11--22

2--4

20--40

5--10

times 2

300

4,000x7

28,000

400

Estimate 3x267

900

500

365x9

3,285